4. The height of the screwing structure can be quickly adjustable, thus it can applied to screw different bottles with same diameter but different height; in addition, when replacing a little part of components, it can realize the screwing of different bottles of different diameter and bottleneck with much convenience;

5. The cap conveying structure is equipped with a photoelectric sensing device to make sure its safety of” starting when no cap; shutting up when full of caps.’ In this way, the machine can run more stable and reliable;

6. The machine should be fixed with a set of vacuum pump and gasholder to realize the automatic vacuum-pumping capping.